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962篇 您的检索式:作者名="KARAM"
    题名 作者 年代 出处 被引量
1PID Controller Optimization by GA and Its Performances on the Electro-hydraulic Servo Control System显示文摘A proportional integral derivative (PID) controller is designed and attached to electro-hydraulic servo actuator system (EHSAS) to control the angular position of the rotary actuator which control the movable surface of space vehicles. The PID gain parameters are optimized by the genetic algorithm (GA). The controller is verified on the new state-space model of servo-valves attached to the physical rotary actuator by SIMULINK program. The controller and the state-space model are verified experimentally. Simulation and experi- mental results verify the effectiveness of the PID controller adaptive by GA to control the angular position of the rotary actuator as com- pared with the classical PID controller and the compensator controller.Karam M. Elbayomy 2008Chinese Journal of Aeronautics2008,21,4:22
2循环荷载下非饱和结构性黄土的损伤模型显示文摘在边界面弹塑性模型基础上,借助胶结体损伤理论与非饱和土力学,提出一个可以描述循环荷载作用下非饱和黄土力学特性的弹塑性本构模型。在损伤模型中,定义胶结体弹性衰减规律,将结构损伤与应变增量的绝对累计值联系起来;并利用土的持水曲线建立常含水量下吸力与土体应力之间的耦合作用关系。通过与循环三轴试验结果的比较,表明该模型能够较好地模拟非饱和黄土在循环荷载作用下的力学特性。杨超 崔玉军 黄茂松 J.M.PEREIRA J.R KARAM 2008岩石力学与工程学报2008,27,4:11
3Dysregulation of gastric H,K-ATPase by cigarette smoke extract显示文摘AIM:To test whether the expression and activity of H,K-ATPase in parietal cells would be affected by cigarette smoke extract.METHODS: Extracts of cigarette smoke were administered into mice by gastric gavage (5 mg/kg body weight/day) for 3 d or in drinking water for 7 or 14 d. For the latter, each day a mouse consumed 5 mL water containing extracts of two cigarettes, on average. Control littermate mice received only vehicle. To compare the amount of H,K-ATPase in control and smoke-treated mice, the stomach was processed for Western blotting and immunohistochemical analysis using monoclonal antibodies specific for α- or β-subunits of H,K-ATPase. The p-nitrophenylphospatase activity assay was used as a measurement for K-dependent H,K-ATPase activity.RESULTS: Probed transblots showed an increase in the amount of H,K-ATPase in smoke-treated mice which was confirmed by immunohistochemistry and was found to be due to increased amounts of protein per parietal cell rather than an increased parietal cell number. The increase in the amount of H,K-ATPase was associated with an enhancement of its enzymatic activity. K-dependent activity in control and smoke-treated mice was significantly different (respectively, 0.12 μmol/mg vs 0.27 μmol/mg per minute, P<0.05).CONCLUSION: Administration of cigarette smoke extract is associated with an increase in the amount and activity of H,K-ATPase and hence, smokers are susceptible to development of peptic ulcer.Muna Hammadi Mohamed Adi Rony John Ghalia AK Khoder Sherif M Karam 2009World Journal of Gastroenterology2009,15,32:7
4Evolution of indications and results of liver transplantation in Europe. A report from the European Liver Transplant Registry (ELTR)显示文摘René Adam Vincent Karam Valérie Delvart John O’Grady Darius Mirza Jurgen Klempnauer Denis Castaing Peter Neuhaus Neville Jamieson Mauro Salizzoni Stephen Pollard Jan Lerut Andreas Paul Juan Carlos Garcia-Valdecasas Fernando San Juan Rodríguez Andrew Burro 2012Journal of Hepatology2012,,3:6
5Tuning combined steam and dry reforming of methane for “metgas”production: A thermodynamic approach and state-of-the-art catalysts显示文摘Nowadays,combined steam and dry reforming of methane(CSDRM)is viewed as a new alternative for the production of high-quality syngas(termed as'metgas',H2:CO of 2.0)suitable for subsequent synthesis of methanol,considered as a promising renewable energy vector to substitute fossil fuel resources.Adequate operation conditions(molar feed composition,temperature and pressure)are required for the sole production of'metgas'while achieving high CH4,CO2 and H2O conversion levels.In this work,thermodynamic equilibrium analysis of CSDRM has been performed using Gibbs free energy minimization where;(i)the effect of temperature(range:200-1000℃),(ii)feed composition(stoichiometric ratio as compared to a feed under excess steam or excess carbon dioxide),(iii)pressure(range:1-20 bar)and,(iv)the presence of a gaseous diluent on coke yields,reactivity levels and selectivity towards'metgas'were investigated.Running CSDRM at a temperature of at least 800℃,a pressure of 1 bar and under a feed composition where CO2-H2O/CH4 is around 1.0,are optimum conditions for the theoretical production of'metgas'while minimizing C(S)formation for longer experimental catalytic runs.A second part of this work presents a review of the recent progresses in the design of(principally)Ni-based catalysts along with some mechanistic and kinetic modeling aspects for the targeted CSDRM reaction.As compared to noble metals,their high availability,low cost and good intrinsic activity levels are main reasons for increasing research dedications in understanding deactivation potentials and providing amelioration strategies for further development.Deactivation causes and main orientations towards designing deactivationresistant supported Ni nanoparticles are clearly addressed and analyzed.Reported procedures based on salient catalytic features(i.e.,acidity/basicity character,redox properties,oxygen mobility,metal-support interaction)and recently employed innovative tactics(such as confinement within mesoporous systems,stabilization through core shell structures or on carbide surfaces)are highlighted and their impact on Ni0reactivity and stability are discussed.The final aspect of this review encloses the major directions and trends for improving synthesis/preparation designs of Ni-based catalysts for the sake of upgrading their usage into industrially oriented combined reforming operations.Karam Jabbour 2020Journal of Energy Chemistry2020,29,9:4
6Akt is negatively regulated by the MULAN E3 ligase显示文摘serine/threonine kinase Akt 在多重细胞的进程工作,包括房间幸存和肿瘤开发。否定地调整 Akt 的机制的研究集中了于调停 dephosphorylation 的 inactivation。在这研究,我们识别了 Akt 的一个否定管理者, MULAN,它拥有一个戒指手指领域和 E3 ubiquitin ligase 活动。Akt 被发现直接与 MULAN 交往并且是由在 vitro 并且在 vivo 的 MULAN 的 ubiquitinated。另外的分子的试金证明 phosphorylated Akt 由 MULAN 是为和 MULAN 和 ubiquitination 的相互作用的一个真实目标。功能的研究的结果建议由 MULAN 的 Akt 的降级压制房间增长和生存能力。这些数据提供卓见进 Akt ubiquitination 发信号网络。Seunghee Bae Sun-Yong Kim Jin Hyuk Jung Yeongmin Yoon Hwa Jun Cha Hyunjin Lee Karam Kim Jongran Kim In-Sook An Jongdoo Kim Hong-Duck Um In-Chul Park Su-Jae Lee Seon Young Nam Young-Woo Jin Jae Ho Lee Sungkwan An 2012Cell Research2012,22,5:3
7Normalised intrinsic mortality risk in liver transplantation: European Liver Transplant Registry study显示文摘René Adam Valérie Cailliez Pietro Majno Vincent Karam Paul McMaster Roy Y Calne John O’Grady Rudolf Pichlmayr Peter Neuhaus Jean-Bernard Otte Krister Hoeckerstedt Henri Bismuth 2000The Lancet . 2000 (9230)2000,,9230:3
8Ghrelin attenuates gastrointestinal epithelial damage induced by doxorubicin显示文摘AIM:To examine the influence of ghrelin on the regenerative potential of gastrointestinal(GI)epithelium.METHODS:Damage to GI epithelium was induced in mice by two intravenous injections of doxorubicin(10 and 6 mg/kg).Some of the doxorubicin-treated mice received a continuous subcutaneous infusion of ghrelin(1.25μg/h)for 10 d via implanted mini-osmotic pumps.To label dividing stem cells in the S-phase of the cell cycle,all mice received a single intraperitoneal injection of 5'-bromo-2'-deoxyuridine(BrdU)one hour before sacrifice.The stomach along with the duodenum were then removed and processed for histological examination and immunohistochemistry using anti-BrdU antibody.RESULTS:The results showed dramatic damage to the GI epithelium 3 d after administration of chemotherapy which began to recover by day 10.In ghrelintreated mice,attenuation of GI mucosal damage was evident in the tissues examined postchemotherapy.Immunohistochemical analysis showed an increase in the number of BrdUlabeled cells and an alteration in their distribution along the epithelial lining in response to damage by doxorubicin.In mice treated with both doxorubicin and ghrelin,the number of BrdUlabeled cells was reduced when compared with mice treated with doxorubicin alone.CONCLUSION:The present study suggests that ghrelin enhances the regenerative potential of the GI epithelium in doxorubicintreated mice,at least in part,by modulating cell proliferation.Mohamed A Fahim Hazem Kataya Rkia El-Kharrag Dena AM Amer Basel al-Ramadi Sherif M Karam 2011World Journal of Gastroenterology2011,17,33:3
9mRNA vaccines: Past, present, future显示文摘mRNA vaccines have emerged as promising alternative platforms to conventional vaccines.Their ease of production,low cost,safety profile and high potency render them ideal candidates for prevention and treatment of infectious diseases,especially in the midst of pandemics.The challenges that face in vitro transcribed RNA were partially amended by addition of tethered adjuvants or co-delivery of naked mRNA with an adjuvanttethered RNA.However,it wasn’t until recently that the progress made in nanotechnology helped enhance mRNA stability and delivery by entrapment in novel delivery systems of which,lipid nanoparticles.The continuous advancement in the fields of nanotechnology and tissue engineering provided novel carriers for mRNA vaccines such as polymeric nanoparticles and scaffolds.Various studies have shown the advantages of adopting mRNA vaccines for viral diseases and cancer in animal and human studies.Self-amplifying mRNA is considered today the next generation of mRNA vaccines and current studies reveal promising outcomes.This review provides a comprehensive overview of mRNA vaccines used in past and present studies,and discusses future directions and challenges in advancing this vaccine platform to widespread clinical use.Mia Karam Georges Daoud 2022Asian Journal of Pharmaceutical Sciences2022,17,4:3
10A study of the impact of environmental loads that penetrate a passive skylight roofing system in Malaysian buildings显示文摘Karam M. Al-Obaidi Mazran Ismail Abdul Malek Abdul Rahman 2014Frontiers of Architectural Research2014,3,2:3
11轻度视乳头水肿及假性视乳头水肿患者视网膜神经纤维层的OCT研究Karam E.Z. Hedges T.R. 邢咏新 2005世界核心医学期刊文摘(眼科学分册)2005,0,8:3
12Non-seminomatous germ cell tumor with bone metastasis only at diagnosis:A rare clinical presentation显示文摘Bone metastasis of non-seminomatous germ cell tumors(NSGCT)of the testes is a rare event and even more uncommon at initial presentation.Generally,bone lesions are discovered in the presence of concurrent retroperitoneal lymph node or visceral disease.However,in this case,a 37 years old male complaining of a growing testicular mass was found to have isolated bone metastasis with associated caudaequina syndrome without apparent abnormal findings on initial computed tomography(CT)scans.Continued neurologic symptoms prompted further evaluation with magnetic resonance imaging(MRI),which demonstrated multiple sites of bone metastasis without evidence of retroperitoneal lymph node or visceral organ involvement.This case represents a rare clinical presentation and disease manifestation of NSGCT.K.C.Biebighauser Jianjun Gao Priya Rao Gene Landon Lance Pagliaro Colin PNDinney Jose Karam Neema Navai 2017Asian Journal of Urology2017,4,2:3
13Clinical benefits of biochemical markers of bone turnover in Egyptian children with chronic liver diseases显示文摘AIM: To investigate the association between serum insulin-like growth factor 1 (IGF-1), osteocalcin, and parathyroid hormone (PTH) levels with the etiology and clinical condition of patients with chronic liver disease.METHODS: Eighty children with hepatocellular damage were divided into 3 groups according to the etiology of disease infection: bilharziasis (9 patients), hepatitis B virus (HBV, 12 patients) and hepatitis C virus (HCV, 29 patients). The Child score index was found as A in 24 patients, B in 22 patients, C in 4 patients. Thirty healthy children served as control group. HBsAg, HBcAbIgM, HBcAbIgG, and anti-HCV were detected using ELISA technique. HCV-RNA was measured by reverse transcription polymerase chain reaction (RT-PCR). Anti-bilharzial antibodies were detected by indirect haem- agglutination test. Liver function tests were performed using autoanalyser. Serum IGF-1, osteocalcin and PTH levels were measured by ELISA technique. Abdominal ultrasonography was also conducted.RESULTS: Serum IGF-1 level was significantly lower in all patient groups with liver diseases, while serum osteocalcin and PTH levels were significantly elevated in patients with HBV and HCV infections compared with the control group. Serum osteocalcin and PTH concentrations were measured with the severity of liver disease from Child A to C. Child A patients unexpectedly showed significantly reduced IGF-1 levels in comparison to patients staged as Child B or C. Serum osteocalcin level was negatively correlated with albumin (14.7 ± 0.54 vs 3.6 ± 0.10, P < 0.05), while that for PTH was positivelycorrelated with total protein (70.1 ± 2.17 vs 6.7 ± 0.10, P < 0.05) in patients with HCV infection.CONCLUSION: Low serum IGF-1 level seems to play a critical role in the bone loss in patients with chronic liver disease. Elevated biochemical markers of bone remodeling suggest high-turnover in patients with viral infection and reflect severity of the clinical stage.Karam A Mahdy Hanaa H Ahmed Fathia Mannaa Azza Abdel-Shaheed 2007World Journal of Gastroenterology2007,13,5:3
14Passive coolin8 techniques throush reflective and radiative roofs in tropical houses in Southeast Asia: A literature review显示文摘Karam M. AI-Obaidi Mazran Ismail Abdul Malek Abdul Rahman 2014Frontiers of Architectural Research2014,3,3:3
15Profiling cellular bioenergetics, glutathione levels, and caspase activities in stomach biopsies of patients with upper gastrointestinal symptoms显示文摘AIM: To measure biochemical parameters in stomach biopsies and test their suitability as diagnostic biomarkers for gastritis and precancerous lesions.METHODS: Biopsies were obtained from the stomachs of two groups of patients(n = 40) undergoing fiberoptic endoscopy due to upper gastrointestinal symptoms. In the first group(n = 17), only the corpus region was examined. Biopsies were processed for microscopic examination and measurement of mitochondrial O2 consumption(cellular respiration), cellular adenosine triphosphate(ATP), glutathione(GSH), and caspase activity. In the second group of patients(n = 23), both corpus and antral regions were studied. Some biopsies were processed for microscopic examination, while the others were used for measurements of cellular respiration and GSH level.RESULTS: Microscopic examinations of gastric corpus biopsies from 17 patients revealed normal mucosae in 8 patients, superficial gastritis in 7 patients, and chronic atrophic gastritis in 1 patient. In patients with normal histology, the rate(mean ± SD) of cellular respiration was 0.17 ± 0.02 μmol/L O2 min-1 mg-1, ATP content was 487 ± 493 pmol/mg, and GSH was 469 ± 98 pmol/mg. Caspase activity was detected in 3 out of 8 specimens. The values of ATP and caspase activity were highly variable. The presence of superficial gastritis had insignificant effects on the measured biomarkers. In the patient with atrophic gastritis, cellular respiration was high andATP was relatively low, suggesting uncoupling oxidative phosphorylation. In the second cohort of patients, the examined biopsies showed either normal or superficial gastritis. The rate of cellular respiration(O2. μmol/L min-1 mg-1) was slightly higher in the corpus than the antrum(0.18 ± 0.05 vs 0.15 ± 0.04, P = 0.019). The value of GSH was about the same in both tissues(310 ± 135 vs 322 ± 155, P = 0.692).CONCLUSION: The corpus mucosa was metabolically more active than the antrum tissue. The data in this study will help in understanding the pathophysiology of gastric mucosa.Ali S Alfazari Bayan Al-Dabbagh Wafa Al-Dhaheri Mazen S Taha Ahmad A Chebli Eva M Fontagnier Zaher Koutoubi Jose Kochiyi Sherif M Karam Abdul-Kader Souid 2015World Journal of Gastroenterology2015,21,2:2
16Out of plane model for heterogeneous periodic materials: the case of masonry显示文摘Antonella Cecchi Karam Sab 2002European Journal of Mechanics / A Solids2002,,5:2
17Molecular landscape in acute myeloid leukemia: where do we stand in 2016显示文摘Acute myeloid leukemia(AML) is a clonal disorder characterized by the accumulation of complex genomic alterations that define the disease pathophysiology and overall outcome. Recent advances in sequencing technologies have described the molecular landscape of AML and identified several somatic alterations that impact overall survival. Despite all these advancement, several challenges remain in translating this information into effective therapy. Herein we will review the molecular landscape of AML and discuss the impact of the most common somatic mutations on disease biology and outcome.Karam Al-Issa Aziz Nazha 2016Cancer Biology & Medicine2016,13,4:2
18Liver transplantation for HBV-related cirrhosis in Europe: An ELTR study on evolution and outcomes显示文摘Patrizia Burra Giacomo Germani Renè Adam Vincent Karam Alfredo Marzano Pietro Lampertico Mauro Salizzoni Franco Filipponi Jurgen L. Klempnauer Denis Castaing Murat Kilic Luciano De Carlis Peter Neuhaus Sezai Yilmaz Andreas Paul Antonio D. Pinna Andrew K. 2012Journal of Hepatology2012,,:2
19Compared Efficacy of Preservation Solutions in Liver Transplantation: A Long‐Term Graft Outcome Study From the European Liver Transplant Registry显示文摘R. Adam V. Delvart V. Karam C. Ducerf F. Navarro C. Letoublon J. Belghiti D. Pezet D. Castaing Y. P. Le Treut J. Gugenheim P. Bachellier J. Pirenne P. Muiesan 2015American Journal of Transplantation2015,,2:2
20Hepatic Hemangiosarcoma: An Absolute Contraindication to Liver Transplantation—The European Liver Transplant Registry Experience显示文摘Giuseppe Orlando Rene Adam Darius Mirza Goran Soderdahl Robert J. Porte Andreas Paul Andrew K. Burroughs Christian A. Seiler Michele Colledan Ivo Graziadei Juan-Carlos Garcia Valdecasas Fran?ois-René Pruvot Vincent Karam Jan Lerut 2013Transplantation Journal2013,,6:2
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